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Finding the Fourth Proportional to 245,586.78, 338,929.43 and 138,150.40

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Solution

The fourth proportional to 245,586.78, 338,929.43 and 138,150.40 is: 190,658.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,586.78 : 338,929.43 = 138,150.40 : x
  2. Step 2: Convert to fraction form
    245,586.78/338,929.43 = 138,150.40/x
  3. Step 3: Cross multiply
    245,586.78x = 338,929.43 × 138,150.40
  4. Step 4: Simplify right side
    245,586.78x = 46,823,236,326.27
  5. Step 5: Solve for x
    x = 46,823,236,326.27/245,586.78
  6. Step 6: Final answer
    x = 190,658.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.